Brake for corn-degerminators.



M. LINDEMANN.

BRAKE FOR CORN DEGERMINATORS.

APPLICATION FILED Aue.25, 1915.

I 2 SHEETS-SHEET l' M. LINDEMANN.

BRAKE FOR CORN DEGERMINATORS.

APPLICATION FILED AUG-25, I915.

Patented Mar. 13, 1917.

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MAX LINDEMANN, OF EAST ST. LOUIS, ILLlIN'OIS.

BRAKE FOR CORN-DEGERMINATORS.

Specification of Letters Patent.

Patented Mar. 13. 1917.

Application filed. August 25, 1915. Serial No. 47,379.

To all whom it may concern Be it known that 1, Max LINDEMANN, a citizenof the United States, and resident of East St. Louis, St. Clair county,Illinois, have invented certain new and useful Improvements in Brakesfor Corn-Degerminators, of which the following is a specificationcontaining a full, clear, and exact description, reference being had tothe accompanying drawings, forming a part hereof.

My invention relates to improvements in brakes for corn degerminator's,wherein the machine to which my brake is attached comprises tworotatable grinding elements, one of which is directly connected withpower and the other driven by the material acted upon between thegrinding elements. 4 The object of my improvements is to construct abraking means for the indirectly driven grinding element which will havea variable, constant braking action which will operate withoutoverheating and which will wear longer and be subject to less repair andreplacing of parts than the brakes now known to me.

In this specification I will give a full, clear and concise descriptionof the construction and operation of my brake, in my claims specificallydesignate my novel construction and arrangement of parts, and in thedrawings show the detail construction of the brake and its arrangementon a corn degerminator. I

In the drawings 1 Figure 1 is a side elevation of a corn degerminatorequipped with a brake constructed according to my invention;

Fig. 2 is a cross sectional elevation of the machine taken on the line22 of Fig. 1; and

Fig. 3 is an enlarged detail sectional elevation of one of the variabletensioned spring actuated rollers and its supporting bracket. Referringby numerals to the accompany- 1ng drawings:

5 designates the machine frame, having the bearings 6 which rota-tablysupport a shaft 7. Mounted on this shaft in a manner to rotate therewithis a frusto-ooni'cal bur or grinding element 8 and a pulley 9 forconnection with power. Supported by the shaft, and surrounding the bur 8is a second frusto-conical bur or grinding element which is free torotate independently of the shaft and the bur 8. Corn or other materialto be ground is applied to the space between the two burs through ahopper 10, which is supported on the machine, frame at or near thesmaller end of the grinding burs.

i/Vhen power is applied to the shaft through the pulley 9 the inner burwill be positively driven and when corn or the like is supplied betweentheburs the outer bur will be carried along with the inner b'ur throughthe material being ground.

In order to check and control the speed of the indirectly driven, outer,grinding bur, to cause it to be rotated at a speed different from thedirectly driven, inner bur, I provide the outer bur with an annularoutstanding flange 1O having an undulated peripheral surface presentingequi-distantly spaced teeth 11 whose crests are preferably acute andwhose valleys are preferably arcuate.

Secured to the machine frame at, or approximately at, diametricallyopposite points and in line with the flange 1O are the brackets 12, eachof which is substantially U-shape and curvilinear in the direction ofits length and have at their bases outstanding feet 13 for securing tothe machine frame.

Pivotally mounted in each bracket is an arm 14: carrying in their freeends a roller 15 arranged to bear on the undulated surface of the flangeon the indirectly driven grinding element. Acting on each arm is aspring 16 which exert pressure on the arms in the same general directionas the travel of the toothed surface to the end that the rollers areforcibly held against the teeth to offer a rolling resistance to therotation of the outer grinding element.

By preference these arms and their rollers are arranged with suchrelation to the undulated surface over which they ride as to cause oneroller to meet an obstructing tooth face while its companion is rollingfreely over an unobstructing tooth face. By this arrangement there isconstant and uniform roller resistance offered to the rotation of theouter or indirectly driven grinding element or bur.

In each bracket I mount a barrel 17 which incases the spring andprevents its lateral buckling, as well as a threaded stem 18 againstwhich the spring impinges in opposition to the arm carrying the rollerand which stem 18 provides for varying the tension of the sprlng asrequired for a variation in pressure of the roller against the undulatedsurface to produce a variation in the speed of rotation of the outer orin directly driven bur or grinding element.

Having thus described my invention, What I claim as new therein anddesire to secure by Letters Patent of the United States therefor, is:

1. In combination With a power driven rotatable grinding element and anindirectly driven rotatable grinding element, a brake for the indirectlydriven grinding element comprising a peripherally toothed annulussecured to the indirectly driven grinding element, a pair of oppositelyarranged rollers, and means for exerting a yielding pressure on saidrollers in the direction of the rotation of said annulus.

2.'In machine of the classdescribed, an inner, power-driven, rotatablegrinding Copies of this patent may be obtained m five cents each, byaddressing the Commissioner of Patents,

element, an outercgrinding element, not connected with power butrotatable along with the inner element by the material actedupon, aflange bearing spaced teeth secured to the outer element, oppositelydisposed spring pressed rollers bearing on said teeth in the directionof rotation of the element, said rollers being relatively arranged sothat While one is hearing on an obstructing MAX LINDEMANN. WVitnesses R.G. ORWIG, E. L. WVALLAon- Washington, D. C.

